Not only people, but also cars need to breathe. The air filter is used to clear the air for the engine.
How much can the air filters differ from each other? It seems so easy– take it to the laboratory and check. But is it necessary? After all, most of the local and foreign manufacturers use the same source material for the manufacture of filters, which is a filter cardboard from several world- famous brands. Therefore, the attempt to check the main qualities of filters– accuracy of dropout rate, dust transmission, etc. will probably disappoint an unlucky researcher. The differences between ten different filters can be minimum or, in any case, minor.
Another difference of filters is a white strip of foam rubber-like material, encircling the filter from the outside,- it is a so-called pre- cleaner. It has relatively large pores and used to hold the largest ” trash from falling into the ” gentle ” filter paper.